a leaked memo from the obama administration claims u.s. citizens accused of being al qaeda operatives may lawfully be killed, even if there's no evidence of an imminent threat. meanwhile, john brennan, the president's nominee for cia director, will face tough questions about that memo in his confirmation hearing tomorrow. >>> and computer hackers have struck the federal reserve. the hacker group, anonymous, claims to have stolen data belongs to some 4,000 bankers. the fed spokeswoman tells "the wall street journal," no critical operations have been affected. >>> and it's being called the largest credit card fraud in history. authorities arrested 18 people based in new jersey, accused of stealing some $200 million after creating thousands of fake i.d.s, with stolen social security numbers. using those fake i.d.s to obtain cards, the suspects allegedly wired money to seven countries, including pakistan and china. >>> and abc news has learned that lance armstrong is the target of an active criminal investigation. federal agents are looking in